class CacheNode(Node):
def __init__(self, nodelist, expire_time_var, fragment_name, vary_on):
self.nodelist = nodelist
self.expire_time_var = Variable(expire_time_var)
self.fragment_name = fragment_name
self.vary_on = vary_on
def render(self, context):
try:
expire_time = self.expire_time_var.resolve(context)
except VariableDoesNotExist:
raise TemplateSyntaxError('"cache" tag got an unknown variable: %r' % self.expire_time_var.var)
try:
expire_time = int(expire_time)
except (ValueError, TypeError):
raise TemplateSyntaxError('"cache" tag got a non-integer timeout value: %r' % expire_time)
# Build a key for this fragment and all vary-on's.
key = ':'.join([urlquote(resolve_variable(var, context)) for var in self.vary_on])
args = hashlib.md5(force_bytes(key))
cache_key = 'template.cache.%s.%s' % (self.fragment_name, args.hexdigest())
value = cache.get(cache_key)
if value is None:
value = self.nodelist.render(context)
cache.set(cache_key, value, expire_time)
return value
class GetLanguageInfoNode(Node):
def __init__(self, lang_code, variable):
self.lang_code = Variable(lang_code)
self.variable = variable
def render(self, context):
lang_code = self.lang_code.resolve(context)
context[self.variable] = translation.get_language_info(lang_code)
return ''
class GetLanguageInfoListNode(Node):
def __init__(self, languages, variable):
self.languages = Variable(languages)
self.variable = variable
def get_language_info(self, language):
# ``language`` is either a language code string or a sequence
# with the language code as its first item
if len(language[0]) > 1:
return translation.get_language_info(language[0])
else:
return translation.get_language_info(str(language))
def render(self, context):
langs = self.languages.resolve(context)
context[self.variable] = [self.get_language_info(lang) for lang in langs]
return ''
def __init__(self, languages, variable):
self.languages = Variable(languages)
self.variable = variable
def __init__(self, lang_code, variable):
self.lang_code = Variable(lang_code)
self.variable = variable
def __init__(self, nodelist, expire_time_var, fragment_name, vary_on):
self.nodelist = nodelist
self.expire_time_var = Variable(expire_time_var)
self.fragment_name = fragment_name
self.vary_on = vary_on